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Yep meant to be dry, but is the seal leaks they get gummed up. So could be either dry and rust, or oily and gummed… I have dismantled, and it wasn’t hard, but it was too long ago to remember the order of disassembly.
Well it turns out I can’t work out how to compress my photos on my phone, so back to words! I have troubles with my shuttle clutch again, most likely due in part to the pressure relief valve sticking again and putting too much pressure on the sellector too suddenly. Not dismantled that all yet, but an added issue is the rubber drive spider between the engine and gearbox has mangled up again. The original was knackered when I first worked on the dozer a decade ago, then I made a new one out of rubber sheet of some kind, that lasted a few years (only a couple of hundred hours use), but last time I had it to bits I made a new one by casting a polyurethane, but that only lasted maybe four hours. So are new ones available or do I need to hunt for some material to make one out of that will be better? Cheers
Well a few years have past since I was last on here, but just to update, my shuttle clutch repairs on the old Gulin worked well while I was using and maintaining it. However I was away from the farm for a couple of years, and the guy the used it in my absence ran it out of oil again and totally cooked it. So a month or so ago I rebuilt it again much as I had done before, though I machined it up some what different so I could fit larger release (throwout) bearings. Also made new springs again! All going good again now, so i am working her hard for a few weeks while I am back at the farm.
Been a wet couple of days over here, so it will be interesting to see how the track has settled and coped with the weather.
Rich, the Alec Molton hydragas system was one of the systems that got me interested in suspension along with Citreon's hydro-pneumatic setup. I wanted a system that achieved more with less compromises than anything I could find, so I built my own. Ten years of sketch on back of envelopes and over a 1000 hours at the old lathe resulted in prototypes of a “Self regulating fully pneumatic suspension system” I think is what I called it in the patent. (Patents are a foolish idea, and I would take a lot of persuasion to go there again.) Basically it is closer related to air suspension, with internal mechanical height control. The ride height, spring rate, and damping rate is all achieved with the same gas, and as a result remains directly proportional to each other and to the load carried. I find practice far more effective and fun than theory!!!
I have a fair bit of experience with tractors and tracked excavators, but this was my first real project using a dozer. So my opinion on the Guilin dozer is from that limited perspective.
I appears to be a very capable little dozer, appears to be the right weight for its size, and the right hp/ton ratio. It would be foolish to expect it to work as fast and hard as a heavier machine. The blade seem to have all the movement and angle variation it needs.
The only limitation I found capability wise that I thought was not comparable to other dozers I had seen working, was reversing up hill. She seemed nose heavy and very inclined to stand up on her tip toes and rock over to one side, which was somewhat disconcerting.
particularly when it is a looooong way down if she did tip over. Maybe I should make a 1/2 ton weight to go on her 3 point to keep the tail down.Having the rear sprockets three feet off the ground and the bonnet (hood for you chaps in USA) closer to vertical rather than horizontal somehow doesn't seem ideal!
Yeah fun country hey. I was brought up in Devon, England, so I thought I was used to hills, but when we moved here in 2001 I realized that our hills back there were more like ripples in the carpet. Also farm back there was smaller than a couple of our paddocks here.
I do have a few vids on Youtube… but not of dozing… more suspension development stuff. The problem with videoing the dozing is it would all be a bit slow. I guess if I did a couple of hours of vid and then speeded it up x12 then it might be fun to watch. If you are interested in my vids of suspension and machining search for 'self regulating pneumatic suspension” or 'Levitation'.
